.input {
    position: relative;
}

.input input {
    position: relative;
    background-color: transparent;
    border: 1px solid #ccc;
    z-index: 2;
}

.input .wbc-placeholder {
    font-size: 13px;
    color: #aaa;
    position: absolute;
    top: 3px;
    left: 2px;
    z-index: 1;
}